1176 J. Org. Chem., Vol. 52, No. 6, 1987
Additions and Corrections
Additions and Corrections Vol. 45, 1980
Leo A. Paquette,* William E. Fristad, David S. Dime, and Thomas B Bailey. Silanes in Organic Synthesis. 8. Preparation of Vinylsilanes from Ketones and Their Regiospecific Cyclopentenone Annulation. Page 3027. Structure 24 in Scheme V should have cis geometry about the styrene double bond. This assignment was originally founded on the relatively large coupling ( J = 15 Hz) between the two vinyl protons. Independent synthesis of the trans isomer by Prof. John A. Soderquist (private communication) has shown JAB in this isomer to be still larger (19 Hz). Thus, in both systems the J values are anomalously high. Importantly, the metalation-silylation sequence involved in the conversion of 23 to 24 proceeds with retention. Since the geometry of 25 is trans as shown, the acylation of 24 occurs with a 2 E change in olefin geometry.
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Vol. 49, 1984
Audrey Miller. A Novel Reaction of Cyanamide with 1,3-Diketones.
chemical shift listed by us as 6 30.69 should have read 40.69. We regret these oversights and thank Professor Christl for calling them to our attention.
Franklin A. Davis,* M. Serajul Haque, Terrance G. Ulatowski, and James C. Towson. Asymmetric Oxidation of Ester and Amide Enolates Using New (Camphorylsulfony1)oxaziridines. Page 2402. Reference 6a should read: Davis, F. A.; Jenkins, R. H., Jr.; Awad, S. B.; Stringer, 0. D.; Watson, W. H.; Galloy, J. J . Am. Chem. SOC.1982, 104, 5412.
Walter W. Zajac, Jr.,* Pinchit Dampawan, and Dolores Ditrow. Reaction of Glycals with Trifluoroacetic Anhydride and Ammonium Nitrate: A Novel Cleavage Reaction of Glycals. Page 2618, column 1, top. f" should be fr where c is R5 = CH20Me, R6 = H. Page 2618, column 1. Structure 4 should be A
c
O
6
" 0-H
NO2
Page 4072, column 2. Scheme I: one of the R groups in 5a-c should be R'. Page 4073, line 20. Change "(29%) of 6a" to "(69%) of la".
4
Vol. 50. 1985
M. Ettinger, R. Nardin, S. Ray Mahasay, and L. M. Stock*. An Investigation of the 0- and C-Alkylation of Coal.
J. M. Masnovi and J. K. Kochi*. Charge-Transfer Photochemistry from Donor-Acceptor Complexes of Anthracenes with Tetranitromethanes.
Page 2842. The acknowledgment was inadvertently omitted. Acknowledgment. This contribution wm supported by a grant from the Basic Coal Science Program of the Gas Research Institute.
Page 5254, column 2, line 15. For photoproduct li, the correct space group is P2,/n. We thank Dr. J. Galloy of the Cambridge Crystallographic Data Center for pointing out the typographical error. Vol. 51, 1986
Tyze-Kuan Yin and Weston Thatcher Borden'. Pyrolysis and Photolysis of 6,7-Diazatricyclo[ 3.2.2.12!4]dec-6-ene. Page 2285. Professor Manfred Christl has kindly pointed out one of the decomthat preparation of tricyclo[4.1.1.02~5]octane, position products of the title compound, has been previously reported [Herbert, R.; Christl, M. Chem. Ber. 1979, 112, 20121 and its 13CNMR spectrum also published [Christl, M.; Herbert, R. Ibid. 1979,112,20221. In addition, Professor Christl brought to our attention the fact that the 13Cchemical shift data for this compound, published by us, contains a typographical error. The
Rolf Gleiter,* Gerhard Krennrich, and Udo H. Brinker. Electronic Structure of Spiropentane and Some Derivatives. Page 2899. The editor regrets that an error was made in the addresses. The correct addresses are Institut fur Organische Chemie der Universitiit Heidelberg, D-6900 Heidelberg 1,West Germany, and FakultAt fiir Chemie der Ruhr-Universitiit Bochum, D-4630 Bochum, West Germany.
Ronald A. Forsch and Andre Rosowsky*. A New One-Step Synthesis of Leucovorin from Folic Acid and of 5-Formyl5,6,7,8-tetrahydrohomofolic Acid from Homofolic Acid Using Dimethylamine-Borane in Formic Acid. Page 4326. The page number of 2852 cited in the Forsch and Rosowsky correction is incorrect; it should be 2582.
